Thermal deformation resistant crosslinked polyethylene cable

Abstract

The utility model discloses a thermal deformation resistant crosslinked polyethylene cable comprising a composite thermal deformation resistant sheath layer, the composite thermal deformation resistant sheath layer is composed of an external thermal deformation resistant layer, an enhancement layer and an inner sheath layer, and the composite thermal deformation resistant sheath layer is internally provided with a composite shielding layer. The composite shielding layer is composed of an outer shielding layer, a middle buffer layer and an inner shielding layer, a composite heat-deformation-resistant cross-linked polyethylene insulating layer is arranged in the composite shielding layer, and the composite heat-deformation-resistant cross-linked polyethylene insulating layer is composed of an anti-bending buffer layer, a heat-deformation-resistant reinforcing layer and an inner insulating layer. The cable core is arranged in the composite heat-deformation-resistant cross-linked polyethylene insulating layer, and the problems that bubbles and cracks appear on the cable and the hardness is reduced due to thermal deformation of the cable are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a cross-linked polyethylene cable which is resistant to heat deformation. Background Art

[0002] As one of the key infrastructures of modern electrification and information society, cables play a vital role. From deep-level communication networks to household appliances in daily life, cables are usually composed of conductors, insulation layers, shielding layers and sheath layers. The conductor is the core of the cable and is responsible for transmitting current or signals; the insulation layer is wrapped around the outside of the conductor to ensure that the current or signal will not leak or be interfered with by the outside during transmission; the shielding layer further enhances the cable's anti-interference ability; and the sheath layer protects the internal structure of the cable, enhances the mechanical strength of the cable, and prevents damage to the cable from the external environment.

[0003] For example, the Chinese authorized patent "A cross-linked polyethylene cable" with announcement number CN214505039U includes a filling core, a conductive core, and an insulating layer wrapped on the outer wall of the conductive core. The insulating layer includes a shaping layer, a pressure-resistant layer, an insulating inner layer, a wear-resistant inner layer, a flame-retardant layer, a reinforced outer layer, and an insulating outer layer arranged in sequence. It can better avoid friction inside the cable, has high tensile strength, and solves the problem that the overall structure of the existing cable is not stable enough, and is prone to damage as the use time increases, affecting the overall safety performance.

[0004] Although the above-mentioned existing technology can improve the stability of the cable, it is prone to thermal deformation after long-term use, which will affect the hardness of the cable and cause its performance to deteriorate. As the temperature rises, the molecules of the cable material will diffuse, making the cable softer, thereby reducing its hardness. When the material temperature is too high or too fast, bubbles and cracks may appear in the cable, which will also cause its hardness to decrease, further affecting its performance. Therefore, it does not meet the existing needs. In this regard, we propose a cross-linked polyethylene cable that is resistant to heat deformation. Utility Model Content

[0005] The utility model aims to provide a cross-linked polyethylene cable resistant to heat deformation, so as to solve the problem of bubbles and cracks in the cable and reduced hardness due to heat deformation proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a heat-resistant cross-linked polyethylene cable, comprising a composite heat-resistant sheath layer, the composite heat-resistant sheath layer consisting of an external heat-resistant layer, a reinforcement layer and an inner sheath, a composite shielding layer is arranged inside the composite heat-resistant sheath layer, the composite shielding layer consists of an external shielding layer, an intermediate buffer layer and an inner shielding layer, a composite heat-resistant cross-linked polyethylene insulation layer is arranged inside the composite shielding layer, the composite heat-resistant cross-linked polyethylene insulation layer consists of an anti-bending buffer layer, an anti-heat-resistant reinforcement layer and an inner insulation layer, and a cable core is arranged inside the composite heat-resistant cross-linked polyethylene insulation layer.

[0007] Preferably, the external heat-resistant deformation layer is located outside the reinforcing layer, and the external heat-resistant deformation layer is in contact with the reinforcing layer, and the reinforcing layer is located outside the inner protective layer, and the reinforcing layer is in contact with the inner protective layer.

[0008] Preferably, the outer shielding layer is located outside the middle buffer layer, and the outer shielding layer is in contact with the middle buffer layer, and the middle buffer layer is located outside the inner shielding layer, and the middle buffer layer is in contact with the inner shielding layer.

[0009] Preferably, the anti-bending buffer layer is located outside the anti-heat deformation reinforcement layer, and the anti-bending buffer layer and the anti-heat deformation reinforcement layer are extruded together, and the anti-heat deformation reinforcement layer is located outside the inner insulation layer, and the anti-heat deformation reinforcement layer and the inner insulation layer are extruded.

[0010] Preferably, the cable core comprises a conductor, a coating layer and a filling layer, the coating layer is wrapped around the outside of the conductor to form a wire core, and the filling layer is filled in the gap between the wire core and the composite heat-resistant cross-linked polyethylene insulation layer.

[0011] Preferably, the conductor is formed by twisting a plurality of copper wires.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model is provided with a composite heat-resistant sheath layer, which is composed of an inner sheath, a reinforcement layer and an outer heat-resistant deformation layer. The composite heat-resistant deformation sheath layer is made of high-temperature resistant material and can maintain stable performance in high-temperature environments and extend the service life of the cable. The introduction of the reinforcement layer significantly improves the bending resistance of the cable, so that it can maintain stable electrical performance in a complex bending environment. The multi-layer structure design makes the cable perform well in terms of tensile and compressive resistance, can adapt to various harsh use environments, and has excellent insulation and protection properties.

[0014] 2. The utility model is provided with a composite shielding layer, which is composed of an inner shielding layer, an intermediate buffer layer and an outer shielding layer. The multi-layer structure design of the composite shielding layer can provide more comprehensive electromagnetic shielding, effectively reduce the interference of external electromagnetic fields on internal signals of the cable, and improve the stability and accuracy of signal transmission. The outer shielding layer is made of high-strength material, which can improve the overall mechanical strength of the cable so that it can still maintain good shielding performance under external forces such as bending and stretching. The introduction of the intermediate buffer layer can reduce the pressure on the inner shielding layer during the bending process of the cable, reduce the risk of damage to the shielding layer, and thus extend the service life of the cable.

[0015] 3. The utility model is provided with a composite heat-resistant cross-linked polyethylene insulation layer, which is composed of an inner insulation layer, a heat-resistant deformation reinforcement layer and an anti-bending buffer layer. The composite heat-resistant cross-linked polyethylene insulation layer significantly improves the heat resistance and heat deformation resistance of the cable in a high temperature environment by introducing a specially modified cross-linked polyethylene material, thereby ensuring the stability of the cable under long-term high-temperature operation. The introduction of the anti-bending buffer layer effectively alleviates the stress generated by the cable during the bending process, reduces the risk of damage to the insulation layer, thereby improving the bending resistance and service life of the cable. The design of the multi-layer insulation structure enables the cable to have better insulation performance, reduces the probability of electrical failures, and improves the electrical safety of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the composite heat-resistant deformation-resistant sheath layer of the utility model;

[0019] Figure 4 It is a schematic diagram of the composite shielding layer structure of the utility model;

[0020] Figure 5 It is a schematic diagram of the structure of the composite heat-resistant cross-linked polyethylene insulation layer of the utility model.

[0021] In the figure: 1. Composite heat-resistant sheath layer; 11. External heat-resistant layer; 12. Reinforcement layer; 13. Inner sheath; 2. Composite shielding layer; 21. External shielding layer; 22. Intermediate buffer layer; 23. Inner shielding layer; 3. Composite heat-resistant cross-linked polyethylene insulation layer; 31. Anti-bending buffer layer; 32. Heat-resistant reinforcement layer; 33. Inner insulation layer; 4. Cable core; 5. Conductor; 6. Coating layer; 7. Filling layer. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] See also Figure 1-5 The utility model provides an embodiment: a heat-resistant cross-linked polyethylene cable, comprising a composite heat-resistant sheath layer 1, the composite heat-resistant sheath layer 1 is composed of an outer heat-resistant layer 11, a reinforcement layer 12 and an inner sheath 13, a composite shielding layer 2 is arranged inside the composite heat-resistant sheath layer 1, the composite shielding layer 2 is composed of an outer shielding layer 21, an intermediate buffer layer 22, and an inner shielding layer 23, a composite heat-resistant cross-linked polyethylene insulation layer 3 is arranged inside the composite shielding layer 2, and the composite heat-resistant cross-linked polyethylene insulation layer 3 is composed of an anti-bending buffer layer 31, an anti-heat-resistant reinforcement layer 32 and an inner insulation layer The composite heat-resistant cross-linked polyethylene insulation layer 3 is composed of a cable core 4, and the composite heat-resistant sheath layer 1 is made of high-temperature resistant material, which can maintain stable performance in a high-temperature environment and extend the service life of the cable. The multi-layer structure design of the composite shielding layer 2 can provide more comprehensive electromagnetic shielding and effectively reduce the interference of external electromagnetic fields on the internal signals of the cable. The composite heat-resistant cross-linked polyethylene insulation layer 3 significantly improves the heat resistance and heat deformation resistance of the cable in a high-temperature environment by introducing specially modified cross-linked polyethylene materials, thereby ensuring the stability of the cable under long-term high-temperature operation.

[0024] See also Figure 3 The external heat-resistant deformation layer 11 is located on the outside of the reinforcement layer 12, and the external heat-resistant deformation layer 11 is bonded to the reinforcement layer 12. The reinforcement layer 12 is located on the outside of the inner protective layer 13, and the reinforcement layer 12 is bonded to the inner protective layer 13. The external heat-resistant deformation layer 11 is cross-linked polyethylene, which forms a three-dimensional network structure through a cross-linking reaction. It has excellent heat resistance and heat deformation resistance, and can resist damage to the cable in a high temperature environment. The reinforcement layer 12 is aramid fiber, which has the characteristics of high strength and light weight, and can improve the bending resistance of the cable. The inner protective layer 13 is cross-linked polyethylene, which forms a three-dimensional network structure through a cross-linking reaction. It has excellent heat resistance and heat deformation resistance.

[0025] See also Figure 4The outer shielding layer 21 is located outside the middle buffer layer 22, and the outer shielding layer 21 is in contact with the middle buffer layer 22. The middle buffer layer 22 is located outside the inner shielding layer 23, and the middle buffer layer 22 is in contact with the inner shielding layer 23. The outer shielding layer 21 is a copper tape with excellent conductivity and mechanical strength, and can effectively resist external electromagnetic interference. The middle buffer layer 22 is a polyester film, located between the inner shielding layer and the outer shielding layer, and is made of a soft and elastic material. It not only provides mechanical buffering and reduces the pressure on the inner shielding layer during the bending process of the cable, but also can maintain the shielding effect to a certain extent. The inner shielding layer 23 is an aluminum foil with the characteristics of light weight and good conductivity, and can provide a good electromagnetic shielding effect: it is closely attached to the outside of the cable insulation layer, and its main function is to preliminarily isolate electromagnetic interference and effectively block the interference of external electromagnetic fields on the internal signals of the cable.

[0026] See also Figure 5 The anti-bending buffer layer 31 is located outside the anti-heat deformation reinforcement layer 32, and the anti-bending buffer layer 31 and the anti-heat deformation reinforcement layer 32 are extruded together. The anti-heat deformation reinforcement layer 32 is located outside the inner insulating layer 33, and the anti-heat deformation reinforcement layer 32 and the inner insulating layer 33 are extruded. The anti-bending buffer layer 31 is silicone rubber, and the outermost layer is designed to be a soft anti-bending material, which can effectively relieve the stress generated by the cable when it is bent. The anti-heat deformation reinforcement layer 32 is modified cross-linked polyethylene. By adding heat stabilizers and cross-linking agents, its stability and resistance to heat deformation at high temperatures are improved. The inner insulating layer 33 is cross-linked polyethylene. After the cross-linking reaction, a three-dimensional network structure is formed, which improves the insulation performance and heat resistance: it is close to the cable conductor and serves as the initial isolation of the insulation layer.

[0027] See also Figure 1 and Figure 2 The cable core 4 includes a conductor 5, a coating layer 6 and a filling layer 7. The coating layer 6 is wrapped around the outside of the conductor 5 to form a core, and the filling layer 7 is filled in the gap between the core and the composite heat-resistant cross-linked polyethylene insulation layer 3.

[0028] See also Figure 2 , the conductor 5 is formed by twisting a number of copper wires.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A heat-resistant cross-linked polyethylene cable, comprising a composite heat-resistant sheath layer (1), characterized in that: The composite heat-resistant sheath layer (1) is composed of an outer heat-resistant sheath (11), a reinforcement layer (12) and an inner sheath (13); a composite shielding layer (2) is arranged inside the composite heat-resistant sheath layer (1); the composite shielding layer (2) is composed of an outer shielding layer (21), an intermediate buffer layer (22) and an inner shielding layer (23); a composite heat-resistant cross-linked polyethylene insulation layer (3) is arranged inside the composite shielding layer (2); the composite heat-resistant cross-linked polyethylene insulation layer (3) is composed of an anti-bending buffer layer (31), an anti-heat-resistant reinforcement layer (32) and an inner insulation layer (33); a cable core (4) is arranged inside the composite heat-resistant cross-linked polyethylene insulation layer (3).

2. A cross-linked polyethylene cable resistant to heat deformation according to claim 1, characterized in that: The external heat-resistant deformation layer (11) is located outside the reinforcement layer (12), and the external heat-resistant deformation layer (11) and the reinforcement layer (12) are in contact with each other; the reinforcement layer (12) is located outside the inner protective layer (13), and the reinforcement layer (12) and the inner protective layer (13) are in contact with each other.

3. The heat-deformation-resistant cross-linked polyethylene cable according to claim 1, characterized in that: The outer shielding layer (21) is located outside the middle buffer layer (22), and the outer shielding layer (21) and the middle buffer layer (22) are in contact with each other; the middle buffer layer (22) is located outside the inner shielding layer (23), and the middle buffer layer (22) and the inner shielding layer (23) are in contact with each other.

4. A cross-linked polyethylene cable resistant to heat deformation according to claim 1, characterized in that: The anti-bending buffer layer (31) is located outside the anti-heat deformation reinforcement layer (32), and the anti-bending buffer layer (31) and the anti-heat deformation reinforcement layer (32) are co-extruded, and the anti-heat deformation reinforcement layer (32) is located outside the inner insulation layer (33), and the anti-heat deformation reinforcement layer (32) and the inner insulation layer (33) are extruded.

5. The cross-linked polyethylene cable resistant to heat deformation according to claim 1, characterized in that: The cable core (4) comprises a conductor (5), a coating layer (6) and a filling layer (7); the coating layer (6) is wrapped around the outside of the conductor (5) to form a wire core; and the filling layer (7) is filled in the gap between the wire core and the composite heat-resistant cross-linked polyethylene insulation layer (3).

6. A cross-linked polyethylene cable resistant to heat deformation according to claim 5, characterized in that: The conductor (5) is formed by twisting a plurality of copper wires.

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